Our Instant Power® Hair and Grease® drain opener is the solution for the most common drain stoppages. This unique formulation dissolves hair clogs from bathroom drains and creates heat to melt grease from kitchen sinks. This is the strongest non-acid formulation on the market. We recommend that Hair and Grease® be allowed to stay in the drain overnight. The longer it remains in the drain the more drain clogging material it will dissolve.